Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a microcrystalline quartz) specimens identified by the Rock Identifier community.
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Septarian Nodule
Septarian Concretion (CaCO3, CaMg(CO3)2, SiO2)
sedimentary
Banded Agate (Onyx type)
Silicon dioxide (SiO2)
mineral
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Agate
Silicon Dioxide (SiO2) - variety: Chalcedony
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Chert (Flint variety)
Microcrystalline context of Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (varietal Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often found as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (specifically Flagstone)
Arenite (primarily composed of SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Jasper
Silicon Dioxide (SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Carnelian Agate
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
sedimentary
Banded Agate (Orca Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Chert (River Pebble)
Chert (SiO2)
sedimentary
Pink Quartzite
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Aventurine
Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral